Seven Smithsonian museums along the National Mall in D.C. are closed Thursday because of a "mechanical issue," authorities say.⁠ ⁠ The Smithsonian Institution website shows an announcement that says that the museums are closed. They did not immediately share details on the problem.⁠ ⁠ News4's Megan McGrath reports. Get the full list at the link in bio.⁠ ⁠ #smithsonians #nationalmall #tourism #museums #washingtondc